Collapsible core



April 22 1924.

1,491,681 P. DE MATTIA COLLAPSIBLE CORE Filed Aug. 8. 1G22 5Sheets-Sheet 2 mom/frs April 22 1924 1,491,681

P. DE MATTIA coLLAPsBLE CORE Filed Aug. 8 1922 5 Sheets-Sheet 5 April 221924.

P. DE MATTIA COLLAPS IBLE CORE Filed Aug. 8 1922 5 Sheets-Sheet 4 IllVl/ENTH Pfff? 7E/AWM moeurs Patented a. sa.

, narran seras `EJE/Il."fl-R DE'MATI, OF CLFTON, NEW JERSEY, ASSIGNOR TODE MATTIA BROS., OF"

til tit GARFIELD, new JERSEY, A oonronarron or new JERSEY.

COLLAPSIBLE CORE.

Application filed Ang'aat 8, 1922. Serial No. 580,465.

To 0:71 iti/iowa it 71mg/ concern.'

Be it. known that l, lli-:rien Dit iilarrm', a citizen of the UnitedStates, and a resident ot Clifton, in the -county ot Passa-ic and Stateof New Jersey, have invented certa-in new and uset'ul Improvements inCollapsi-v hlc Cores, of which the following is a tull7 clear`and'exact. description.l

The present invention relates to collapsible cores employed in themanufacture of.

pneumatic tires.

T he object ot the present invention is to produce a collapsible core soconstructed "that the segmental sections may he collapsed to a maximumdegree, and thus facilitate the separation of the core and t-ire formedthereon no matter what the size of the tire may be.

In large tires the central openingr is relatively smalland as aconsequence there is but a. limited l'icldwithin whichto manipulate themovable parts of the core in removin .fr the core sections from thetire. The object. ot' the lpresent invention is to produce a collapsiblecore so constructed. that the segmental sections may he removed from thetire with a minimum distortion thereo'l1 and whereby the sections aremoved in such relation to each other that a maximum Freedom oi incrementof the various segmental sections may be produced. and at the same timeproduce a maximum retraction or collapse oi the parts. thus greatlyfacilitatingthe separation ot the tire and core with a minimumdistortion of the tire.

A tui-ther ohject of the invention to provide means tor insuring theabsolute rigidity oi the parts when the segmental core sections areassembled in operative continuitv. while at the same time providing forthat flexibility of operation which is re-` quired.

With the foregoing objects in view, the present invention consists ofthe collapsible core and the devices and combinations of devices whichwill he Yhereinafter described and claimed.

vThe invention is illustrated in y panying drawings in whiclrthe accom-Fig. 'i shows a top plan view ot the core with the parts in operativecontinuity.

Fig'. 2 shows a fragmentary sectional View taken on the line Q-Qlin Fig.l, looking in the direction of the arrow in that ligure.

Fig. 3 is a Jfrag'rnentary detail showing one ot the locking bolts whichhold the key sections ot' the core in operative continuity.

Fig. 4 Vis a vertical sectional View taken through the core and itssupport on theline le- 4- in Fig; l, the central shaft and other partsbeing shown in elevation.

Fig. 5 is a view similar to Fig. 3, illustrating the holt retracted.

Fig. 6 is a fragmentary detail of a part of the tablefwhich supports thekey sect-ions, and of portions of the retaining arms of such keysections.

Fig. 7 is a cross sectional View through the core taken on the line 7 7in Fig. l, a portion of the jack arm and other part-s being shown inelevation.

Fig. S is a fragmentary detail partly in elevation and partly insection7 illustrating the means for connectingr the chuck members whenthe core sections are in operative continuity.

Fig. 9 isa fragmentary cross sectional de-` tail taken on the line 9-9in Fig. 1.

Fig'. l() is a diamctric planview showing one ot 'the chuck members andits connected core Sections, and also showing the key sections in theposition which they will oc copy after the initial collapsingmovement,the tire being indicated by the dotted circle. Fig. ll shows a sideelevation of the parts shown in Fig. 10,y illustrating diametrically theposition of the core sections vafter'the initial collapsing movement,and indicating in dotted lines, the tire. Y

Fig. 12 illustrates diametrically' in plan view. the collapsing of thecompound piv oted coresections, the shaded portions indieating theposition of the key sections after they have'been removed from the tire.

Fig. 13 shows in side eleva-tion the position ot the parts as shown inFig. 12. In both of these figures the tire is indicated in dottedlines.-

` Fig. 14 shows in plan view, the collapsing or retracting of one of theswinging sections of the core, other parts Vbeing shown dia- Y.Jnetrieally.

' the parts of the core when wholly retracted as in Fig. 16.

Fig. 18 is a side elevation of the parts shown in Figs. 16 and 17. A

Similar reference characters will be employed throughout thespecification and drawings to designate corresponding parts.

In the drawings there is shown a collapsi ble core formed -of sixsegmental sections, there being two key sections 1, locateddiametrically opposite each other, two compound pivoted sections 2located adjacent one of the key sections, and two relatively longswinging pivoted sections 3 interposed between the pivoted sections2 andthe other key section. As indicated, the joints lebe tween lthe keysections 1, and the adjacent sections 2, will preferably converge fromthe inner toward the outer peripheries, while the joints 5 between thesections 2 and the sections 3 are formed approximately. ra-

. dially.

The key sections 1 are pivotally mounted at 6 to arms 7 extending from aplate '8 'forming part of the chuck, the arrangement being such that thekey sections may swing upwardly-about the pivots 6 into and ou'tof ahorizontal plane. It is intend d that they shall not be permitted toswing.down'd wardly below a'horizontal plancQ/a'itto' prevent thisdownward swing each of the ey sections is provided with inwardlyproject-ing arms 9, which at their inner ends are plate 8 (see Figs. 1,3 and 8.)

provided with lugs 10 arranged to engage 'the under surface ofprojections 11 of the In order that the key` sections shall be heldrigidly 'when they are/depressed or when they are in the position shownin Figs. 1 and 7, the arms 9 are also provided with overhanging lugs-12(se Fig. 8), which are arranged to be engaged by the sliding bolts 13,as shown clearly in Figs. 1, 3 and 8. The overhang. ing lugs 12 areshorter than the lugs 10, so that they may clear the projections 11 ofthe plate 8, in their downward movement. The bolts 13 are mounted uponthe upper surface of the plate 8, by means of headed screws-14 passingthrough slots 15 in said meneer bolts, and they are provided withangularly disposed arms 16 which are pivoted at 1 to a block 18, theblock being pivotally mounted at 19 tothe plate 8 and provided with'ahandle 20 by means of which the block 18 may be turned about its pivot19 to retract or advance the bolts 13 as desired. The bolts 13, at theirforward ends, are provided with notches 21 (sce Figs. 3 and 8), arrangedto engage pins or studs 22, the arrangement being such that the studs22and the notches 21 cooperating with the.

slots 15 and the screws 14 will insure a radial movement of the bolts13, while at the same time permitting a rocking movement of the arms 16of the bolts. YVhen the bolts are extended as shown in Fig. 1, the keysections 1 will be held in the plane of the core and in operativecontinuity with the other core sections, but whenit is desired to per`mit the withdrawal ofthe key sections from the tire, the bolts 13 willbe retracted, thus releasing the lugs 12 of the arms 9.

The sections 2 are what might be termed compound pivotal sections. Eachof them is pivotcd as at 24, to an arm 25 ot a lever 26, and the levers26'are in turn pivotcd as l at 27, to levers 28 which are pivotallyconnected at 29 to the chuck plate 23. The pivots 24 and 27 are at rightangles to each other, whereby the sections 2 may be swung inwardly aboutthe pivots 24, and thereafter Aswung upwardly about the pivots 27, asindicated in Fig. 12 oi the drawings. ,The sections 3 are pivotallyconnectedA at 30,`t( the levers 28, so that the sections 3 may'not onlypartake of the inward movement/caused by the rocking of the levers 28about the pivots 29, but also so that they may have a pivotal movementabout the pivots 30.

This arrangement of the sections is such that 4 the key sections 1 havea movement up and dowvn, into and out ot the plane ot the core, thesections 2 have an inward movement and. 4anyupward movement into and outot the planeot the core, so that they may be caused to rest upon thesections 3 as shown inl Fig. 16, and the sections 3 may be swunginwardly and contracted as shown in Fig. 16.

The chuck plate 8 is held by means ot bolts 31 tothe upper surtaceof atable 32, the said table being provided with a cylindrical or tubularbearinfr 33 mounted to turn u h Nil) I sutlicient distance to enable thestuds 22 to 1,491,681 i' l sa .turnedto raise or lower the spindle A38as requlred. The arrangement is such that through the worm and worm gearthe spindle 38' of the chuck plate 23 may be raised and lowered withrespect to the chuck plate 8, and carries with it the sections 2 and 3and the levers 28 and intermediate connections between such levers andthe sections 2 and 3, while the chuck plate 8 remains stationary, allfor a purpose which will be hereinafter described. The levers 28 carrythe studs 22 and the free ends of the studs 22 have a sliding engagementwith openings 42 in the chuck plate 8, the studs 22 being tapered attheir lower ends, as shown at 43, and provided with collars 44 arrangedto take into countersunk recesses in the upper surface of the chuckplate 8 at the upper ends of the openings or apertures. 42, the

arrangement being such that when the studs 2 are in engagement with theopenings in the chuck plate, the levers 28 are prevented from having anymovement about the pivots 29, and no such movement can be had until thespindle 38 has been raised Vupwardly a entirely clear the-chuckplate 8,and as the collars .44 will be under the bolts 13 the chuck platescannot be separated until said bolts are retracted.

y `The chuck plate 23 is fitted to the"upper vend of the spindle 38which is tapered' as Yshown at 45, the chuck plate being provided with atai. ered' bearing' 46 to fit the tapered end 45 of the spindle, whichlatter has a threaded extension 47 receiving a nut 48 whereby the chuckplate 23 is fixedly secured to the upper end of the spindle` 38. Thetable 32 which carries the chuck plate 8 is intended to be revolvedfreely, and in order to reduce the friction. or resistance torevolution, to aminimum. the bearing 34 is provided with suitableball'or anti-friction bearings 49.

As shown in Fig. 2 of the drawings,.the

y levers 26 carrying the sections 2 will be pivote'd in such manner tothe levers 28 thatinclined abutting shoulders 50 will be providedbetween the levers 26 and the back of the recesses 5l formed in thelevers 28, in which the levers 26 areymounted. the in-V clined shoulders50 bein'g below the pivots 27, so that tlieY levers 26 may* be turnedupwardly with ruelation to the plane of the core, but will not bepermitted to turn downwardly.' thus materiallyfadding to the rigidit;7of the device when the parts are in oper` ative continuity, while at thesame time permitting absolute freedom of movement to the sections 2 incollapsing the core.

Preferably. the meeting ends of tlm. seci I tions 2 and 3 will beprovided with interlocking tenons and grooves 52 and 53. and also,preferably, the key sections 1 will be v.provided with the o'set lugs 54designed to engage `the adjacent sections 2 (see Fig. 9 of the drawing).The pivots 30 forming the connectie between the sections 3 and thelevers 28 may 'ie extended upwardly as shown at: 55 to form handles orknobs which may be grasped to rock the levers 28 about the pivots 29. toimpart inward and outward movements to the sections 3. i f The chuckplate 23 will also be provided with sockets 5G to receive a .stud 5Tcarried by a cout ling 58 to which a lever 59 is pivotallv connected atG0 (sec Fig. l5). This lever 59 provided with an adjustable slide 61movable alongithe lever 59 andl held thereto by the teeth G2. theslidecarrying a chain G3, the free end of which is provided with a hookG4. llach of the sections 2 is provided with a cross-pin or other device65 with which the hook 64 mav be engaged. and with the pin 57 seated inone kofthe sockets 5G and the slide 6l propcrlvadjusted along the lever59. a rocking movement'ofthe lever. about the pivot 60 will pull thesections 2 out of the tire. The chain G3 passes through a guide G6carried by the lever 59. It will of course he understood that havingremoved one of the sections 2 from the tire. the leverI will be shiftedto the other socket in the chuckplatc 2 3 and /coupled up to the othersection 2 'pto be removed.

After the sections 2 have heen'removed and i turned up as shown in Figs.i4. 16 and 18. a'

plate or arm 67 will be connected to the upper end of the spindle 38.said plate having a socket at its forward end. to receive p' indicatedin Fig. i4 of the drawings.y

ln operation. assuming that the parts arc in the position as shown inFig. l. and that a tire has heen formed thereon. b v grasping the handle20 and rocking it in the direction of the arrow shown in Fig. i. thesliding bolts i3 are retracted. thus releasing the arms 9 of the kevsections l. and also releasing the bolts 22 carried by the levers 28.Thereafter. by turning the worm` 40. the spindle 38 is moved upwardlywithin the tubular sleeve 33, thus raising thcchuck plate 23 and thelevers 28. with the sections A2 and 3 of the core. This movement of thesections 2 and 3 above the plane of operative .continuity of the part-scauses thc sections l to be rocked about their pivots 6. Thus. theSections l will loe withdrawn from the tire. and when the sections 2 and3. with-tho tire, have reached a point above the operative plane ofsections l, sufficiently to cause 4the sections l to be entirelyvithdrawn from the tire, they will bc released and drop ybackward intothe plane of thechuck plate 8. This leaves the tire supported b v thesections 2 and 3 at opposite diametrieal points position of the parts isindicated in Figs.

This

' which, by shifting the bolts 1G,

' for one pair of such sections,

10 and 11. Thereafter, by means of the lever 59, its chain and hook, thesections Q are withdrawn from the tire, the movement being irst inwardabout the pivots 24: as a center, and having once cleared the tire theyare moved upwardly to a position above the sections 3, this movementbeing illustrated in Figs. 12 and 13. Having removed the sections 2 andplaced them above the sections 3, then the lever 59 is connected to theplate 67. 'and by means of its chain and hook, the sections 3 arewithdrawn from the tire and brought to the position shown in Fig. 16,which shows the maximum collapsing movement of the parts, tire, as shownin dotted lines in Fig. 16, will not be entirely free of the ends of thesections 3, at the lett ot' that tig. but by lifting the tire up andshifting it laterally to the left itwill be entirely disengaged from thecore, after which the sections will be returned to normal position, andby lowering the chuck plate 23 the core sections will be brought intooperative continuity, this movement causing the studs 22 to engage theopenings in the chuck plate 8 after the arms of the key sections 1 willbe locked, and also the levers 28 locked to the chuck plate 8.

I claim:

1. A' collapsible core, comprising a plu- `rality of segmental coresections arranged in groups of pairs, a relatively fixed carrier for onepair ot such sections, and a relatively movable carrier for the othersections, and pivoted levers supporting a pair of the sections mountedon the movable carrier.

. 2. A collapsible core, comprising a plurality of. segmental coresections arranged in groups of pairs,

and a relatively movable carrier carrying two pairs oi' such sections,and pivoted levers supporting the pairs or sections mounted on themovable carrier, one section of each pair mounted on the movable carrierhaving a pivotal action into and out of the plane of the other sectionof the pair.

8. A collapsible core, comprising a relatively 'fixed chuck plate, acore section pivoted thereto and movable into and out of the plane ofoperative continuity, a movable chuck plate movable towards and from thefixed. chuck plate, core ksections connected to the movable chuck plateand arranged to be' contracted and expanded, and a locking devicearranged to lock the plates against relative movement and the sectionsin operative continuity.

4. A collapsible core, comprising a plurality of groups ot segmentalsections, one pair of 'such groups pivoted for a vertical swingingmovement, and another pair of such groups pivoted for a horizontalswinging movement. y

and at this point the a relatively fixed carrierv acercar 5. Acollapsible core, comprising a fixed chuck plate, a pair oidiametrically disposed core sections pivoted thereto to swing into andout of the plane of the core, a chuck plate carrying other coresections, means to move the movable chuck plate and core sections, and alocking device mounted on the fixed chuck plate to lock the platesagainst movement and the sections of the core in operative continuity. l

6. A collapsible core, comprising swinging levers, a pair ofcoresections pivoted thereto to swing inward and outward,and lockingbolts to hold the levers in their outward position.

7. A collapsible core, comprising a plurality of segmental coresebtions, two of the sections movable into and out of the plane movableof the core, and two of the sections mounted te move at right angles tothe movement of the other two sections.

8. A collapsible core, comprising a plurality of segmental coresections, two of such sections carried by a fixed chuck plate, meanswhereby said sections may be moved at right angles to the plane of thecore,a movable chuck plate, levers pivoted thereto, a pair of coresections pivoted to the levers, and

another pair ot core sections also pivoted to the levers, the pivots oraxes of movement being at right angles to each other.

9. A collapsible core, comprising a pair of pivoted levers, coresections pivoted thereto to. swing with the levers 'and independentlythereof, and another pair of core sections pivotally mounted on saidlevers to swing at right angles to the movement'oft the levers, and alsoin and out of the plane ot the core.

:10. A collapsible core, comprising a rotary table, a chuck platemounted thereon, segmental c'ore sections diametrically disposed withrelation to each other and pivotally supported by said chuck plate, amovable chuck plate, a spindle supporting said movable chuck plate, corelsections mounted on said movable chuck plate,studs carried by saidmovable chuck platev and arrangedlto engage the fixed chuck plate, andlockingl bolts supported by said fixed chuck plat/e to engage saidStuds. I l

1.1. Av collapsible core, comprising a chuck plate, a core sectionpivoted t ereto to swing at right angles to tensions or arms carried bysaid ,core section, a stop carried by the arms and Iengaging the'underside of the chuck plate and overhangthe plane oit the plate, exiing lugs positioned to be engaged' by sliding i y bolts.

12. A collapsible core, comprising a core section having an expandingand contracting movement, a core section pivotally supported withrelation to the first named core section, and a pivotal connectionwhereby the latter core section can be moved into and out of the planeof the first named core secsection mounted to move into and out ofthetion, and positioned over and coincident with plane of operativecontinuity on an indethe same. pendent support and'to movewith relation10 13. A collapsible core comprising a core to the 1 osition ofoperative continuity in its 5 section mounted to move into and out ofthe own p ane but in a plane parallel to the position of and plane ofoperative contplane of operative continuit nuity, @fixed -supporttherefor, and a. core PETER DE MATTIA.

